package demo1;

public class Test {
    public static void main(String[] args) throws InterruptedException {
        Counter counter=new Counter();
        Thread t1 =new Thread(()->{
            for (int i = 0; i <5_0000 ; i++) {
                counter.increase();
            }
        });
        Thread t2 =new Thread(()->{
            for (int i = 0; i <5_0000 ; i++) {
                counter.increase();
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println(counter.count);
    }
}
class Counter{
    public static volatile int count=0;
    public void increase(){
        count++;
    }
}
